Die-sinking cutter.



H. MELLING.

DIE summe GUTTER.

APPLIOATION I'ILED APE. 20, 1914.

Patented Nov. 3, 1914.

HERMAN MELLING, OI JACKSON, MIGI-IIGAN.

DIE-SINKING GUT'IER.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application filed April 20 1914. Serial N0. 833,154.

T all 107mm it mag concem Be it known that I, HERMAN MELLING, a citiZen 01 th-e United States, residing at J ackson, in the county of J ackson and State of Michigan, have invented certain nevv and useful Improx ements in Die-Sinking Cutters, of which ehe following is a specification.

This invention relates to improven'aents in die sinking cutters.

T110 object of this invention. is to provide an improved cutting t001 f0r use in die sinking or routing machines.

Further objects, and objects re1ating t0 details and economies of structure a;nd operation Will definitely appear from the detailed description to follow.

I accomp1ish the objects of my invention by the devices and means described in the following specification.

'Ihe invention is clearly defined and pointed 0ut in the c1aims. 1

A strueture constituting a preferred embodiment 01' my invention is illustrated in the accompanying drawing forming a part of this specification, in which:

Figure I is a view in side elevation 0f a structure embodying my in vention. Fig. II is a front elevation. Fig. III is a view in rear e1evation. Fig. IV is a. detai1 sectional view taken 011 the 1ine 4.1 of Fig. I. Fig. V is 21 detai1 .seotiona1 view tanken on the 1ine 55 01 Fig. I. Fig. VI is a detai1 s0ctional view taken 011 J;he 1ine 66 0f Fig. I.-

In the dravving, simi1ar reference characters refer to similar parts throughout the severa1 views, and the sectiona1 views are taken looking in ehe direction 0f the 1itt1e arrows at the ends of the section 1ines.

Considering the numbered parts. of the drawing, my improved cutting t001 cousists 01 a body portion 4 provided With a plane shoulder 2 from which 1:1ses the carrying shank l, said shan1: havmg prowded therein a. beve1ed n0tch 3 adapted to 100 engaged by a set screw er simi1ar device for securing the cutting t001 in place. 13e10w the shoulder 2 the body portion 41 is tapered inward1y toward the front of the toolas at 5. The body portion 0f the t001 is provided W'1th a contracted neck 6 and centrally disposed recesses 10, 10 are provided in said neck ab euch side thereof. The t001 is provided Wi'th a plurality 0f cutting knives, the outer cutting edges 0f which 11e 011 the a.rc of a oirc1e having its center coincident with the recesses 10. Each of these cutting radiating from the 1ecesses 10 to the 0uter edges 0f the knives and'thes0 cutting edges are tapered inward slightly toward the outer ends, -as clearly shown in .Figs. II, III und VI. The sides 0f each cutting kriife are tapered inwardly from eaeh cutting edge -to the faceof the next knife. T110 rear 11 of each knife is ine1ined from the outer edgethere0f ifiwardly to the face of t110 1510xt si1cceeding knife.

These cutting tools are especially adapted f0r Use in the die'sinking machine shown and described in my prior Patent, N0. 1,028,125, and this t001is especia.lly used in the forming 015 dies for drop forging t0 rout out a half round channel in the die. The t001 1s secured in p1aee in the die sinking machine in a, segment which is r00ked back so that a channe1 is routed 0ut 0f the inateria.l by the action of the cutting edges.

It W111 100 seen that the cutting edges are inclined inWardly f1om the center totheir 0uter edge Withthe result that the end 0f the channe1 routed 0ut by these cutting knives is slight1y taperd. The objeCt-of this is t0 facilitate the removirig 01 the forging fr om the dies. 'Ihe contracted neck 6 is pfovided in order t0 enable the ctting knives to move through the fu1l half circle,

und the r0cesses 10, 10 are pr0vided t0 faeilitate the dressing of the cutting edge3 throughout their entire 1ength. When inserted in p1ace in the die sinking machine the shoulder 2 1imits the movement 0f the t001 in 0ne direction and the t001 is securely he1d in place by means 01? a set screw engaging the beveled n0tch 8 by means 0f Whi0h the 15001 is uniform1y brought t0 the same osition.

I have found however that cally as W011 as broad1y as'indicated by my appended claims.

l-laving thus dscribed n1y invention, what I dann as new and desire 130 secu1e by Letters Patent is:

l. A eutting tool of tl1e dass described comprising a body portion having a plane npper surface forming a shoulder, a shank rigid With said body portion and extending at right angles to said plane surface, said shank being provided with a beveled 110td1 therein, a cutting portion, and a neck C011- neeoing said cutting portion With said body por ti0n Said eutting portion being provided witl1 centrally disposed recesses, and having a plurality of cutting knives with the outer ends thereof disposed on tl1e arc of a cirde having its cente1* 0n the axis 0f said cutting portion said knives being provided With cutting edges radiating fro1n sald axis, and indined inwardly toward tl1e 0uter ends thereof, and the sides 0f said cutting knives being tapered inwardly toward 'the face of the next succeeding knife, all coacting snbstantially as described 1":or the purpose speeified.

2. A eutting tod 01 the dass deseribed comprising a body portion having a plane uppe1 suri'ace forn1ing a shoulder, a sl1ank rigid with said body portion and extending at rigl1t angle's t0 said plane surfaee, a cutting portion, and a neek conneeting said eutting portion with said body portion said cutting portion being provided with centrally disposed 1*eeesses, and having a plurality of eutti11g knives with the outer ends there0li' disposed on tl1e are of a cirde having its center 011 tl1e axis 0f said cutting portion said knives being provided with cutting edges radiating from said axis, a11d indined inwardly toward tl1e outer ends thereof, anal tl1e sides of said cutting knives being tapered inwardly toward theface of ehe next succeeding knife, all coacting sub stantially as described for the purpose speeified.

3. A eutting tool 0f the dass deseribed con1prising a body portion having a plane upper surface forming a sl1oulder, a sl1ank rigid with seid body portion and extending at '1i l1t angles t0 said plane surface, a entting portion, and a neck connecting sa1'd eutting portion With said body portion, and having a plurality of cutting knives with the outer ends thereof disposed 0n tl1e am 0f a eirde l1aving its eenter on tl1e axls of said cutting portion, said knives being provided Witl1 cntting edges radiating l'101n said axi s and inclined inwardly toward the entre ends thereolt', and the sides of said cutting knives belng tapered inwardly to- Wa1d the faee 0'l tl1e riext 'sueceedin knife, all coacting substantially as deseribed f01 the purpose specified.

4. A cutting cool 0f the dass deseribed, con1prising a sl1ank having a reduced neek and a cutcing portion carried thereby the axis of said eutting portion being substantially at right angles t0 tl1e longitudinal axis 0f said sl1ank and said eutting portion being provided with a plurality of cutting edges radiating fro1n the axis 0f said cut ti ng portion and a plurality cf transversely extending eutting edges disposed 011 tl1e arc cf a cirde having its center 011 said axis, all coacting substantially as described 1"i01 tl1e purpose specified.

In wlt-ness wl1ereof I have hereunto set n1y hand and seal in the presenee 0f two witnesses.

HERMAN MELLING. [L. s.l

Nitnesses:

THOMAS A. VILSON, M. ELIZABETH HAMMOND.

Genies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

